Tractor tread



Feb. l8, 1930. G. A. SANGUINETTI 1,747,433

' TRACTOR TREAD Filed Oct. 51, 1927 Jig v 6a INVENTOR .9 6490.1 1 Siuzfazlnelti BY @mgmm";

ATTORNEY Patented Feb. 18, 1930 uNrrsa sTA'rEsP-ATENT orrlcE GEORGE A. SANGUIN ETTI, F PETERS, CALIFORNIA TRACTOR TREAD Application filed October 31, 1927. Serial No. 2295903,

when the tractor is being turned, the cleats exerting a very bad lateral abrasive or gouging action on the road surface.

The principal object of my invention therefore is to provide attachments for application to the shoes or tread of a tractor so constructed and arranged as to prevent the cleats from thus cutting into hard ground and to provide a smooth flat contacting surface with the ground so that the turning of the tractor is facilitated without danger of damaging the road.

My improved attachments, which are particularly intended to be applied to a tractor when the latter is to travel over roads, need however never be removed even when the tractor again works in soft ground, since an effective grip on the ground will still be maintained.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claim.

In the drawings similar characters of reference indicate corresponding'parts in the several views: I

Fig. 1 is a perspective outline of a portion of the tread of a tractor of the endless track type, showing my improved ground bearing Referring now more particularly to the characters of reference on the drawings, "the ground bearing shoes or tread members of a standard tractor of the endless track type comprise substantially fiat plates 1 each hav- '55 ing a transversely extend-ingcleatorrgrouser :2-projecting outwardly therefrom adjacent one end. These cleats are comparatively narrow and when engaged with a road surface support the weight of the tractor and tend" to dig into the road :as will be evident.

-My improved ground bearing attachments comprise blocks 4, of a lesser width. and length than the shoes and adapted to be disposed in transversely staggere relati 011135 alternate shoes of the tread through the length thereof. Each block is disposed on its shoe behind the cleat, relative to' the direction of travel'of the machine and abuts against said cleat; the side of the block adjacent the cleat having a curvature the same as that of the cleat-as shown at l, so as to bear snugly thereagainst for its full height.

The blocks are substantially the same height as the cleats, and while they may be slightly greater in height they should never in any event be of a lesser height.

The blocks are also disposed so that one side extends to a side edge of the tread, and

said side is rounded toward the outer or blocks are formed right and left hand so as to permit them to be mounted'in the desired staggered relation, while maintaining the curved sides facing the adjacent side edges of the shoes.

By reason of this construction and arrangement it will be seen that the weight of the tractor is supported by the flat surfaced blocks instead of by the cleats, and the latter are thus held from engagement with the ground. When turning corners the outer curved sides of the blocks permit the same to slide later-c ally without any tendency to dig into the ground. Since the rear transverse edges of l the blocks are at right angles to the shoes, and

since the working sides of the cleats are not covered by said blocksfortheirfulleXtent,the

tractor will not lose any of its ground gripping efliciency when operating in soft ground.

The shoes bearing snugly against the cleats,

i there is no tendency to shear E the holding I boltsand if the'latter are once properly tight- .enedv up the tractor may be 0 erated' indefi nitely without any tendency orithe bolts'ito r break or loosen -.up developing.

While I'have' shown and described at tachments as being applied to' an endless track tread, it will be evident that they may be used with equally good results on wheel tractors as well. w a i "From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects'ofthe j "invention as set-forth herein.

" -While this specification-sets forth indetail the present and preferred construction 3 V I of the device, still'in practice such deviations I 1 from such detail may be resorted to as do not form a departure from the spirit of the inv vention, asdefined by the appended claim.

I 7 Having thus described my invention what Igclairnas new and useful and desire to secure .30

by Letters Patent is: p v I In a tractor tread structure comprising tread plates having transverse cleats projecting'outwardly therefrom, blocks of considerablylesser' width than the plates and of not w 'lesserheight than the height of the cleats,

projecting outwardlyfrorn'the plates adjacent the cleats, said blocksbeing'arranged in al- 7 'ternatelystaggered relation transversely of the tread and disposed adjacent the side edges of the plates, whereby to enable said blocks to V be ,relatively'n'arrow compared-to the total 7 width of the plates and cleats while still maintaining the'stabilityof the'structure when supported on the blocks. V j I In testimony whereof I aifix my signature.

GEORGE A; SANGUINETTI.' c 

